Aqueous processable, multilayer, photoimageable permanent coatings for printed circuits
US5643657A · kind A · utility
15Cited by
11References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An aqueous processable, photoimageable element for use as a permanent coating for the protection of printed circuits composed of multiple layers of photoimageable compositions has suffiently low tack to avoid premature adhesion to the printed circuit substrate but develops good adhesion to the circuit substrate upon application of heat and pressure during lamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.